Brake-shoe.



I C. W. ARMBRUST.

' BRAKE SHOE. APPLICATION FILED APR-17.19162.

1&39Ak5, Patented Se t. 11,1917.

, llz'g: 7" a Jinan/[WWW I IATES PAINT WEI CHARLES W. ARMBRUST, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO THE AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF WILMINGTON, DELA- "WARE, A CORPORATION OF DELAWARE.

BRAKE-SHOE.

Original application filed February 1.9, 1916, Serial No. 79,237.

Specification of Letters Patent.

I atenteol Sept. 11, 1917.

Divided and this application filed April 17,

1916. Serial No. 91,623.

gtate oi Illinois, have invented a certain new and useful Improvement in Brake-Shoes, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to brake shoes and has for its object the provision of an im proved back for brake shoes which should be simple in construction and easy of manufacture.

My invention herein is a division of my prior application Serial No. 79,237, filed February 19 1916.

My invention contemplates in its preferred form the provision of a back for a brake shoe having a key lug formed in sections, which sections are separated.

I will explain several forms of carrying out my invention more in detail by referring to the accompanying drawing, in which- Figure l is a top view o1"- a back showing one form of construction;

Fig. 2 is a perspective view showing the back in its formed condition;

Fig. 3 is a top view of a blank showing a modified form, and

Fig. 4 is a perspective view showing the back of the modified for-min its formed condition.

Referring to Fig. 1, I show a blank from which a back for a brake shoe is formed, this blank having the body portion 3 provided with holes 1%, which holes 14 serve to permit the metal of the shoe to pass therethrough and securely bind the back and shoe together. The fingers 15 also have cut-away portions 18, which cutaway-portions, when these fingers are bent into C-shape, aline to form' the key slot. An extending portion 19 of these fingers remains horizontal, the fingers being bent again at 20, and suitable holes 21 are again provided to permit of a substantial union between the back and the shoe. The fingers thus are bent upwardly at 16, extend horizontally from the line 22 to the line 23, extend vertically from the line 28 to the line 20, and then again extend horizontally. The openings 18 aline to form the key lug. A

central strip 2d of the back remains intact for strengthening purposes. Again it will be seen that the back remains in its original condition except that it is given the necessary curvature.

In Figs. 3 and 4 I show a modified form of the invention in which the fingers 15 are drawn from the body portion 3 at right angles to the manner of drawing them in Fig. 1. t

From what has been described it is thought the nature of my invention will be readily clear to those skilled in the art. Having however thus described several forms which my invention may take, what I claim as new and desire to secure by Letters Patent is:

1. A back for a brake shoe provided with a key lug, said key lug consisting of two fingers formed out of the body of the back, each forming a portion of said lug, and each having two separated cut-away portions to form a part of the key slot.

2. A back for a brake shoe provided with a key lug, said key lug consisting of two oppositely extending fingers formed out 01' the body of the back, each forming a portion of said lug and each having two separated cut away portions to form a part of the key slot.

3. A back for a brake shoe having a key lug formed of two fingers drawn longitudinally from the body of the back, the material between said fingers and on both sides thereof forming three strips adapted to hold the back and shoe together.

i. A back for a brake shoe consisting of a body strip provided with a key lug consisting of two longitudinal oppositely extending fingers formed of continuous strips of metal drawn loi'igitudinally out of the body of said back within the side edges thereof.

5. A back for a brake shoe provided with a holding lug consisting of two oppositely extending fingers parallel. with each other and with the side edges of the back drawn longitudinally out of the back without twisting.

6. A back for a brake shoe consisting of a body strip having an integral lug divided throughout longitudinally of said back.

7. A back for a brake shoe consisting of a body strip h aving an integral continuous lug separated throughout longitudinally of said back.

8. A back for a brake shoe consisting of a body strip and having a sectional lug divided longitudinally of said back.

9. A brake shoe having a longitudinally 1s)lot1ted lug divided longitudinally of said ac 10. A back for a brake shoe provided with a key lug, said key lug consisting of two untwisted fingers drawn longitudinally out of the body of the back without bending the remaining portions of said back. r

11. A back for a brake shoe provided with a key lug, said key lug consisting of two oppositely extending untwisted fingers drawn longitudinally out of the body of the back without bending the remaining portions of said back.

12. A back for a brake shoe provided with a key lug, said key lug consisting of two untwisted fingers drawn longitudinally out of the body of the back,'each forming a portion of said lug without bending the remaining portions of said back.

13. A back for a brake shoe provided with a key lug, said key lug consisting of two oppositely extending untwisted fingers formed out of the body of the back, each forming a portion of said lug and extending longitudinally of said back.

14. A back for a brake shoe provided with a key lug, said key lug consisting of two 7 lingers drawn longitudinally out of the body of the back between its outside edges.

15. A back for a brake shoe provided with a key lug, said key lug consisting of two fingers drawn longitudinally out of the body of the back without twisting said fingers.

16. A back for a brake shoe having a key lug formed of two oppositely extending untwisted fingers drawn longitudinally out of the body of the back within its edges.

17 A back for a brake shoe, provided with two key lug sections forming oppositely extending fingers drawn longitudinally out of the back.

drawn longitudinally out of said back.

20. A brake shoe back comprising a plate and two parallel untwisted strips drawn 1011- gitudinally from the plate and arched between their ends to form a lug. I

21. A brake shoe back comprising :a plate and two strips drawn longitudinally from the plate within its edges and arched uniformly.

22. A brake shoe back comprising a plate, two strips drawn longitudinally from the plate within its side edges and arched in the direction of their length.

23. A brake shoe back comprising a plate and two strips drawn longitudinally from the plate and within its side edges and archeduniformly in the di-rection of their length and separated from each other.

24. A brake shoe back having two strips spaced from each other and from the side edges of the back and arched uniformly in the direction of their length.

25. A brake shoe back having a lug consisting of two uniform sections spaced apart and locked adjacent the side edges of the back.

26. A brake shoe back having a lug consisting of two uniform sections spaced from each other and from the side edges of the back.

27. A brake shoe back having two strips adjacent the sides thereof and arched uniformly lengthwise with the back.

28. A brake shoe back having two strips a-tthe sides thereof arched to form a lug and provided with recesses therein for a keyway.

29. A brake shoe back having two strips, the sides thereof being arched to form a lug and provided with oppositely disposed re cesses for the 'keyway.

30. A brake shoe back having two strips at the sides thereof arched to form a lug and an integral longitudinal extending strip between the arched strips.

81. A'brakeshoe back having two strips at the sides thereof arched to form a lug and an integral longitudinally extending strip between and below the arched strips to strengthen the back beneath the lug.

In witness whereof, I hereunto subscribe.

my name this 14th day of April, A. D. 1916.

CHARLES W. ARMBRUSI.

Vitnesses:

MAX WV. ZABEL. IIAZEL A. J owns.

7 Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

